Here is the full list of all 48 Conqueror's Blade achievements.
Defeat Valen and his troops.
Create your first unit.
Own three units.
Unlock 10 units on the Unit Tree.
Own ten units.
Reach Level 20.
Reach Level 40.
Reach Level 60.
Equip some horse barding.
Kill 5 heroes.
Kill 10 Heroes.
Kill 100 Heroes.
Kill 200 Heroes.
Kill 500 Heroes.
Kill 20 enemy troops.
Kill 200 enemy troops.
Kill 2,000 enemy troops.
Kill 3,500 enemy troops.
Kill 8,000 enemy troops.
Unlock all the peasant units.
Collect three warhorses in your stable.
Earn the badge "A Deadly Century".
Earn the badge "Shatter the Ranks".
Earn the badge "Hat-Trick".
Get a badge "Quad Kill".
Earn the badge "No Quarter".
Earn the badge "Drop Dead".
Disband any unit.
Disband ten units.
Switch your default warhorse.
Craft a piece of Uncommon equipment.
Craft 100 pieces of Uncommon equipment.
Craft a piece of Rare equipment.
Craft a piece of Epic equipment.
Craft a piece of Legendary equipment.
Craft a weapon for the first time.
Destroy every target on The Strawman's Challenge in between 20 and 25 seconds.
Earn the badge "Noble Cause" three times.
Earn the badge "Echoes of Achelous" 15 times.
Earn the badge "Make It Happen" three times.
Earn the badge "Overthrown" three times.
Earn the badge "No Quarter" five times.
Earn the badge "God of War" four times.
Earn the badge "A Deadly Century" ten times.
Earn the badge "Grand Bloodbath" five times.
Earn the badge "The Phlegethon Flows" three times.
Earn the badge "Cut a Swath" 30 times.
Craft 100 pieces of Rare equipment.